I try to compiled this guide for Acer 4520 users, some variants of this model may work with this tips, the other may not, hope you the lucky number one . This guide below I write in Indonesian, sorry for disappointing you, because lacks of guide about this issues in Indonesian.

http://sty-thehybrid.blogspot.com/2008/03/installing-ubuntu-710-aka-gutsy-gibbon.html

Sty - Knowledge is Free